My Rosetta Stone course is startin to introduce a new grammar subject. 

Bu pasta bu sabah yapıldı.

Bu fotoğraf ne zaman çikildi? 

Bu ev geçen kış inşa edildi.

So the new grammar concept is inserting this il/ıl right before the past. I´m confused by the meaning of this. If anyone knows what this means please let me know!! Thank you in advance.

that il/ıl is for the passive voice. 

this pie was made this morning. 

When was this photo taken?

This house was built last winter. 

I hope this helps.